I can't recommend highly enough Ken Fornetran Woodwinds at 849 1/2 Bloor St W. in Toronto for sax repairs and advice. Ken is the master and by my knowledge, the shop most local pros (and amateurs and students) go to get the best work done at very competitive prices.
He also sells vintage and new horns and all the right accessories.
He has done amazing work on my saxes and is the only place I take my stuff to. ( I drive by at least 10 music stores to get to his)